Chicago police say Facebook 'secret groups' traffic in guns and drugs

Announcing the arrests at a news conference, Police Superintendent Eddie Johnson initially criticized Facebook as being unhelpful during a 10-month investigation by his department. Police did not detail charges facing the 50 men and women arrested through Thursday, but said there were “dozens and dozens” of private Facebook groups being used for illegal drug and weapons transactions. Arrest warrants for 18 more suspects have been signed, and most have prior criminal histories, police said.